Question 429982
  <pre><font face = "Tohoma" size = 4 color = "indigo"><b>
Hi
D = {{{sqrt ((x[1]-x[2])^2+(y[1]-y[2])^2))}}}
(-1,2),
(4,-2),  D = {{{sqrt((-5)^2 + 4^2)}}} = sqrt(34)
(2,-2).  D = {{{sqrt(2^2 + 0)}}} = 2
(-1,2),  D = {{{sqrt(3^2 + (-4)^2)}}} = sqrt(25) = 5
 P = 7+ sqrt(34) = 12.83 units
{{{drawing(300,300,   -6, 6, -6, 6, grid(1),
circle(-1, 2,0.3),
circle(4, -2,0.3),
circle(2, -2,0.3),
line(-1,2,4,-2),
line(4,-2,2,-2),
line(2,-2,-1,2),
graph( 300, 300, -6, 6, -6, 6))}}}